HYDROPHILIC GELS FROM PHOTOINITIATORS BASED ON POLYALKYL ETHERS Russian patent published in 2016 - IPC C08F2/50 C08J3/28 C08J3/75 A61M25/00 A61L29/00 A61L29/06 A61L29/08 

FIELD: chemistry.

SUBSTANCE: invention deals with method of obtaining catheter, which includes hydrophilic gel. Method includes stages of combining polymeric photoinitiator of general formula R₁(A₁)_r-(R₂(A₂)_m-O)_o-(R₃(A₃)_n-O)_p-R₄(A₄)_s with one or several gel-forming polymers and/or gel-forming monomers with formation of matrix composition. R₂ represents -CH₂CH₂-, in which one or several H atoms can be substituted with A₂, R₃ represents -CH₂CH₂-, in which one or several H atoms can be substituted with A₃, R₁ represents OH, R₄ represents H, each of o and p is a real number from 0 to 5000, on condition, that o+p>0 and o has value not less than 1, and m = 1 and n = 0, each of r and s is 0. A₁, A₂, A₃ and A₄ are benzophenone photoinitiator fragments, bound to R₁, R₂, R₃ and R₄ respectively via spacer group, selected from alkylenether group. Then matrix composition is hardened by UV-radiation, influenced by medium, which causes swelling with further introduction into catheter.

EFFECT: provision of method for obtaining catheter, applied in medicine, where at least part of its surface is covered with cross-linked hydrophilic gel.

9 cl, 6 dwg, 1 tbl, 5 ex